increase required PHP version up to 8.0 (#76)

Author: avsej

package.xml

@@ -2789,7 +2789,7 @@
     <dependencies>
         <required>
             <php>
-                <min>7.4.0</min>
+                <min>8.0.0</min>
             </php>
             <pearinstaller>
                 <min>1.10.1</min>